<?php
	if(wp_verify_nonce($_POST['act_setting_update_airport'],'act_setting_update_airport'))
	{
		update_option("setting_update_airport", stripslashes($_POST['setting_update_airport']));
	}	
?>
<form action="" method="post">
	<p>Enter List Airport ( EX: Noi bai,Tan son nhat...)</p>
	<textarea rows="5" cols="100" name="setting_update_airport"><?php echo esc_attr( get_option('setting_update_airport') ); ?></textarea>
	<br/>
	<input type="submit" value="update">
	<?php wp_nonce_field('act_setting_update_airport','act_setting_update_airport');?>
</form>	